If XXX is a Poisson random variable with λ=2\lambda = 2λ=2, what is P(X=0)P(X=0)P(X=0)?
e−2e^{-2}e−2
2e−22e^{-2}2e−2
1−e−21 - e^{-2}1−e−2
1/21/21/2